<template>
  <el-form v-show="getShow" ref="loginRef" :model="loginForm" :rules="loginRules">
    <el-form-item v-if="tenantEnabled" prop="tenantId">
      <el-select v-model="loginForm.tenantId" filterable :placeholder="proxy.$t('login.selectPlaceholder')" style="width: 100%">
        <el-option v-for="item in tenantList" :key="item.tenantId" :label="item.companyName" :value="item.tenantId"></el-option>
        <template #prefix>
          <svg-icon icon-class="company" class="el-input__icon input-icon" />
        </template>
      </el-select>
    </el-form-item>
    <el-form-item prop="username">
      <el-input v-model="loginForm.username" type="text" size="large" auto-complete="off" :placeholder="proxy.$t('login.username')">
        <template #prefix>
          <svg-icon icon-class="user" class="el-input__icon input-icon" />
        </template>
      </el-input>
    </el-form-item>
    <el-form-item prop="password">
      <el-input
        v-model="loginForm.password"
        type="password"
        show-password
        size="large"
        auto-complete="off"
        :placeholder="proxy.$t('login.password')"
        @keyup.enter="handleLogin"
      >
        <template #prefix>
          <svg-icon icon-class="password" class="el-input__icon input-icon" />
        </template>
      </el-input>
    </el-form-item>
    <el-form-item v-if="captchaEnabled" prop="code">
      <el-input
        v-model="loginForm.code"
        size="large"
        auto-complete="off"
        :placeholder="proxy.$t('login.code')"
        style="width: 63%"
        @keyup.enter="handleLogin"
      >
        <template #prefix>
          <svg-icon icon-class="validCode" class="el-input__icon input-icon" />
        </template>
      </el-input>
      <div class="login-code">
        <img :src="codeUrl" class="login-code-img" @click="getCode" />
      </div>
    </el-form-item>
    <el-form-item>
      <el-row style="width: 100%">
        <el-col :span="6">
          <el-checkbox v-model="loginForm.rememberMe">{{ proxy.$t('login.rememberPassword') }}</el-checkbox>
        </el-col>
        <el-col :offset="6" :span="12">
          <el-link style="float: right" type="primary" @click="setLoginState(LoginStateEnum.RESET_PAS)">{{ proxy.$t('login.forgetPassword') }}?</el-link>
        </el-col>
      </el-row>
    </el-form-item>
    <el-form-item style="width: 100%">
      <el-button :loading="loading" size="large" type="primary" style="width: 100%" @click.prevent="loginbtn">
        <span v-if="!loading">{{ proxy.$t('login.login') }}</span>
        <span v-else>{{ proxy.$t('login.logging') }}</span>
      </el-button>
    </el-form-item>
  </el-form>
  <div id="captcha-div"></div>
</template>

<script setup lang="ts">
import { getCodeImg, getTenantList } from '@/api/login';
import { LoginStateEnum, useLoginState } from './loginState';
import { useUserStore } from '@/store/modules/user';
import { LoginData, TenantVO } from '@/api/types';
import { to } from 'await-to-js';
import { useI18n } from 'vue-i18n';
import '@/assets/styles/captcha/css/tac.css';
import '@/assets/styles/captcha/js/jquery.min.js';
import '@/assets/styles/captcha/js/tac.min.js';

const { proxy } = getCurrentInstance() as ComponentInternalInstance;

const userStore = useUserStore();
const router = useRouter();
const { t } = useI18n();

const { getLoginState, setLoginState } = useLoginState();
const getShow = computed(() => unref(getLoginState) === LoginStateEnum.LOGIN);

const loginForm = ref<LoginData>({
  tenantId: '000000',
  username: 'admin',
  password: 'admin123',
  rememberMe: false,
  code: '',
  uuid: ''
} as LoginData);

const loginRules: ElFormRules = {
  tenantId: [{ required: true, trigger: 'blur', message: t('login.rule.tenantId.required') }],
  username: [{ required: true, trigger: 'blur', message: t('login.rule.username.required') }],
  password: [{ required: true, trigger: 'blur', message: t('login.rule.password.required') }],
  code: [{ required: true, trigger: 'change', message: t('login.rule.code.required') }]
};

const codeUrl = ref('');
const loading = ref(false);
// 验证码开关
const captchaEnabled = ref(true);
// 租户开关
const tenantEnabled = ref(true);

const redirect = ref('/');
const loginRef = ref<ElFormInstance>();
// 选中的租户
const tenantId = ref('');
// 租户列表
const tenantList = ref<TenantVO[]>([]);

watch(
  () => router.currentRoute.value,
  (newRoute: any) => {
    redirect.value = newRoute.query && newRoute.query.redirect && decodeURIComponent(newRoute.query.redirect);
  },
  { immediate: true }
);

const loginbtn = () => {
  loginRef.value?.validate(async (valid: boolean, fields: any) => {
    if (valid) {
      const config = {
        requestCaptchaDataUrl: import.meta.env.VITE_APP_BASE_API + '/auth/slider/captcha/image?type=RANDOM',
        validCaptchaUrl: import.meta.env.VITE_APP_BASE_API + '/auth/slider/captcha/check',
        bindEl: '#captcha-div',
        // 验证成功回调函数
        validSuccess: (res: any, c: any, tac: any) => {
          handleLogin();
          tac.destroyWindow();
        },
        // 验证失败的回调函数(可忽略; 如果不自定义会使用默认的)
        validFail: (res: any, c: any, tac: any) => {
          console.log('滑块验证码验证失败重新拉取验证码');
          // 验证失败后重新拉取验证码
          tac.reloadCaptcha();
        }
      };
      const style = {
        logoUrl: 'src/assets/images/captcha-slider.png'
      };
      new (window as any).TAC(config, style).init();
    }
  });
};

const handleLogin = async () => {
  loading.value = true;
  // 勾选了需要记住密码设置在 localStorage 中设置记住用户名和密码
  if (loginForm.value.rememberMe) {
    localStorage.setItem('tenantId', String(loginForm.value.tenantId));
    localStorage.setItem('username', String(loginForm.value.username));
    localStorage.setItem('password', String(loginForm.value.password));
    localStorage.setItem('rememberMe', String(loginForm.value.rememberMe));
  } else {
    // 否则移除
    localStorage.removeItem('tenantId');
    localStorage.removeItem('username');
    localStorage.removeItem('password');
    localStorage.removeItem('rememberMe');
  }
  // 调用action的登录方法
  const [err] = await to(userStore.login(loginForm.value));
  if (!err) {
    const redirectUrl = redirect.value || '/';
    await router.push(redirectUrl);
    loading.value = false;
  } else {
    loading.value = false;
    // 重新获取验证码
    if (captchaEnabled.value) {
      await getCode();
    }
  }
};

/**
 * 获取验证码
 */
const getCode = async () => {
  const res = await getCodeImg();
  const { data } = res;
  captchaEnabled.value = data.captchaEnabled === undefined ? true : data.captchaEnabled;
  if (captchaEnabled.value) {
    codeUrl.value = 'data:image/gif;base64,' + data.img;
    loginForm.value.uuid = data.uuid;
  }
};

const getLoginData = () => {
  const tenantId = localStorage.getItem('tenantId');
  const username = localStorage.getItem('username');
  const password = localStorage.getItem('password');
  const rememberMe = localStorage.getItem('rememberMe');
  loginForm.value = {
    tenantId: tenantId === null ? String(loginForm.value.tenantId) : tenantId,
    username: username === null ? String(loginForm.value.username) : username,
    password: password === null ? String(loginForm.value.password) : String(password),
    rememberMe: rememberMe === null ? false : Boolean(rememberMe)
  } as LoginData;
};

/**
 * 获取租户列表
 */
const initTenantList = async () => {
  const { data } = await getTenantList(false);
  tenantEnabled.value = data.tenantEnabled === undefined ? true : data.tenantEnabled;
  if (tenantEnabled.value) {
    tenantList.value = data.voList;
    if (tenantList.value != null && tenantList.value.length !== 0) {
      loginForm.value.tenantId = tenantList.value[0].tenantId;
      tenantId.value = tenantList.value[0].tenantId;
    }
  }
};

//检测租户选择框的变化
watch(
  () => loginForm.value.tenantId,
  () => {
    tenantId.value = loginForm.value.tenantId;
  }
);

defineExpose({
  tenantId
});

onMounted(() => {
  getCode();
  initTenantList();
  getLoginData();
});
</script>

<style lang="scss" scoped>
.login-code {
  width: 33%;
  height: 40px;
  float: right;

  img {
    cursor: pointer;
    vertical-align: middle;
  }
}

.login-code-img {
  height: 40px;
  padding-left: 12px;
}

#captcha-div {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
</style>
